Metals MCQs Aeronautical Engineering, Alloys MCQs

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Which metal is commonly used in aircraft structures due to its high strength-to-weight ratio? a) Iron b) Copper c) Aluminum d) Lead Answer: c) Aluminum What property of titanium makes it suitable for aerospace applications? a) High thermal conductivity b) High density c) High corrosion resistance and strength d) Low melting point Answer: c) High corrosion resistance and strength In aerospace engineering, which alloy is primarily used for turbine blades due to its high temperature resistance? a) Aluminum alloy b) Steel alloy c) Nickel-based alloy d) Brass alloy Answer: c) Nickel-based alloy Which metal is known for its exceptional wear resistance and is often used in aircraft landing gear? a) Steel b) Titanium c) Brass d) Magnesium Answer: a) Steel Which alloy is a combination of aluminum and copper, known for its high strength and used in aircraft structures? a) Duralumin b) Bronze c) Stainless steel d) Brass Answer: a) Duralumin The term “heat treatment” refers to: a) The process of heating metal to improve its properties b) The process of cooling metal to increase hardness c) The process of melting metal to change its composition d) The process of polishing metal for aesthetic purposes Answer: a) The process of heating metal to improve its properties Which metal is the primary component of bronze? a) Aluminum b) Copper c) Nickel d) Zinc Answer: b) Copper In alloy terminology, “age hardening” is used to describe: a) The process of improving an alloy’s hardness through heat treatment b) The process of making an alloy more malleable c) The process of increasing the alloy’s electrical conductivity d) The process of making the alloy more resistant to corrosion Answer: a) The process of improving an alloy’s hardness through heat treatment Which of the following alloys is commonly used for its high strength and corrosion resistance in aircraft applications? a) Bronze b) Stainless steel c) Lead alloy d) Tin alloy Answer: b) Stainless steel Which metal is known for its low density and is often used in aerospace for its lightweight properties? a) Iron b) Copper c) Magnesium d) Nickel Answer: c) Magnesium What is the primary alloying element in stainless steel? a) Nickel b) Copper c) Zinc d) Lead Answer: a) Nickel Which alloy is primarily used in aircraft engines and high-temperature applications due to its excellent thermal stability? a) Aluminum-bronze b) Nickel-chromium alloy c) Zinc-aluminum alloy d) Copper-tin alloy Answer: b) Nickel-chromium alloy In metallurgy, “ductility” refers to: a) The ability of a metal to withstand tensile stress without breaking b) The ability of a metal to resist corrosion c) The ability of a metal to conduct electricity d) The ability of a metal to resist deformation under compressive stress Answer: a) The ability of a metal to withstand tensile stress without breaking Which of the following metals is known for its high electrical conductivity and is used in electrical connections? a) Aluminum b) Iron c) Copper d) Titanium Answer: c) Copper Which alloy is often used for its high fatigue resistance in aircraft components? a) Bronze b) Steel alloy c) Aluminum alloy d) Lead alloy Answer: c) Aluminum alloy Which metal is known for its high melting point and is often used as a refractory material? a) Tungsten b) Lead c) Tin d) Zinc Answer: a) Tungsten “Corrosion resistance” in metals refers to: a) The ability to withstand degradation due to environmental exposure b) The ability to resist electrical conductivity c) The ability to maintain high temperature stability d) The ability to resist deformation under stress Answer: a) The ability to withstand degradation due to environmental exposure Which alloy is used for its high resistance to wear and tear in aerospace applications? a) Brass b) Bronze c) Stainless steel d) Duralumin Answer: c) Stainless steel “Heat treatment” processes for metals include: a) Annealing, quenching, and tempering b) Melting, casting, and forging c) Polishing, plating, and coating d) Cutting, drilling, and welding Answer: a) Annealing, quenching, and tempering Which of the following is a primary alloying element in high-speed steel? a) Carbon b) Nickel c) Molybdenum d) Lead Answer: c) Molybdenum The term “alloy” refers to: a) A mixture of two or more metals b) A single pure metal c) A non-metallic compound d) A combination of metal and plastic Answer: a) A mixture of two or more metals Which of the following alloys is used in aerospace for its high strength and ability to withstand extreme temperatures? a) Titanium-aluminum alloy b) Copper-silver alloy c) Brass alloy d) Lead-tin alloy Answer: a) Titanium-aluminum alloy “Tensile strength” of a metal measures: a) The maximum stress a metal can withstand while being stretched or pulled before breaking b) The ability of a metal to resist compression forces c) The maximum temperature a metal can endure d) The ability of a metal to conduct electricity Answer: a) The maximum stress a metal can withstand while being stretched or pulled before breaking Which metal is commonly used for its high resistance to oxidation at elevated temperatures? a) Aluminum b) Iron c) Titanium d) Lead Answer: c) Titanium Which of the following is a common application of magnesium alloys in aerospace? a) Aircraft engine components b) Aircraft structural components c) Aircraft landing gear d) Aircraft fuel tanks Answer: b) Aircraft structural components The primary alloying element in “brass” is: a) Zinc b) Tin c) Nickel d) Chromium Answer: a) Zinc “Malleability” in metals refers to: a) The ability to be deformed under compressive stress without breaking b) The ability to resist tensile stress c) The ability to conduct heat d) The ability to resist corrosion Answer: a) The ability to be deformed under compressive stress without breaking Which metal is used in aerospace applications for its low thermal expansion coefficient? a) Aluminum b) Iron c) Titanium d) Copper Answer: c) Titanium Which of the following alloys is known for its excellent resistance to seawater corrosion? a) Aluminum-bronze alloy b) Stainless steel alloy c) Nickel-copper alloy d) Lead alloy Answer: c) Nickel-copper alloy Which metal is used primarily in applications requiring high hardness and wear resistance? a) Steel b) Copper c) Magnesium d) Aluminum Answer: a) Steel “Forging” is a metalworking process involving: a) Shaping metal using compressive forces b) Melting metal and pouring it into molds c) Joining metal pieces using heat d) Cutting metal using high-speed tools Answer: a) Shaping metal using compressive forces “Annealing” is a heat treatment process used to: a) Reduce hardness and increase ductility b) Increase hardness and strength c) Improve electrical conductivity d) Reduce thermal expansion Answer: a) Reduce hardness and increase ductility Which alloy is used for its excellent strength-to-weight ratio and corrosion resistance in aerospace structures? a) Duralumin b) Bronze c) Brass d) Stainless steel Answer: a) Duralumin Which of the following is an example of a superalloy used in high-temperature aerospace applications? a) Inconel b) Bronze c) Brass d) Aluminum alloy Answer: a) Inconel Which of the following metals is most commonly used for electrical wiring due to its high electrical conductivity? a) Aluminum b) Iron c) Copper d) Zinc Answer: c) Copper Which metal has the highest melting point among the following? a) Iron b) Titanium c) Tungsten d) Nickel Answer: c) Tungsten Which alloy is commonly used in aerospace applications due to its high tensile strength and good fatigue resistance? a) 2024 aluminum alloy b) 316 stainless steel c) 6061 aluminum alloy d) 4130 steel alloy Answer: a) 2024 aluminum alloy “Casting” is a manufacturing process that involves: a) Pouring molten metal into a mold to solidify b) Shaping metal using compressive forces c) Joining metal pieces using heat d) Cutting metal using high-speed tools Answer: a) Pouring molten metal into a mold to solidify Which of the following alloys is known for its high resistance to fatigue and is often used in aircraft engine components? a) Nickel-based superalloy b) Aluminum alloy c) Stainless steel d) Brass Answer: a) Nickel-based superalloy Which of the following metals is most commonly used in aerospace applications for its high strength and light weight? a) Steel b) Aluminum c) Copper d) Lead Answer: b) Aluminum Which metal is known for its ability to withstand high temperatures and is used in jet engines and gas turbines? a) Titanium b) Copper c) Zinc d) Lead Answer: a) Titanium Which alloy is commonly used in aerospace for its high strength and resistance to high temperatures? a) Inconel b) Bronze c) Brass d) Zinc-aluminum alloy Answer: a) Inconel “Hardness” in metals is a measure of: a) Resistance to deformation b) Electrical conductivity c) Thermal expansion d) Ductility Answer: a) Resistance to deformation Which metal is often used for its excellent machinability and corrosion resistance? a) Aluminum b) Steel c) Brass d) Titanium Answer: c) Brass Which alloy is known for its ability to retain strength at high temperatures? a) Titanium-aluminum alloy b) Stainless steel c) Zinc-aluminum alloy d) Lead-tin alloy Answer: a) Titanium-aluminum alloy Which of the following metals is used in aerospace applications due to its high strength and resistance to corrosion and fatigue? a) 7075 aluminum alloy b) 304 stainless steel c) 1018 steel d) 2024 aluminum alloy Answer: d) 2024 aluminum alloy “Alloying” is the process of: a) Mixing two or more metals to enhance properties b) Melting a metal to change its composition c) Heating a metal to improve its ductility d) Coating a metal for aesthetic purposes Answer: a) Mixing two or more metals to enhance properties Which metal is most commonly used in aircraft wheels and brake systems due to its high strength and heat resistance? a) Steel b) Aluminum c) Magnesium d) Titanium Answer: a) Steel Which of the following is a characteristic of high-strength low-alloy (HSLA) steel? a) Enhanced strength and toughness b) High thermal conductivity c) High corrosion resistance d) Low density Answer: a) Enhanced strength and toughness Which of the following metals is known for its use in bearings and bushings due to its low friction properties? a) Bronze b) Brass c) Aluminum d) Stainless steel Answer: a) Bronze

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